Apparatus for ascertaining the degree of purity of air.



' I J. OALAPAT Y LEON.

APPARATUS FOR ASOERTAINING THE DEGREE 0E PUEITY OF AIR.

APPLICATION FILED FEB.13, 1913.

1,101,400, Patented June 23, 1914.

m 2 w HI 9' m l gumrnnsrn'rns PA ENT OFFICE.

JUAN CALAFAT Y LEON, 0F MADRID, $PAIN.

APPARATUS FOR ASGER-TAINING THE DEGREE 0F PURITY OF AIR.

gree of purity or corruption of the air, ac-

cordin to its proportion in oxygen.

We linow that the air is a gaseous mixture of oxygen, nitrogen, carbon dioxid, vapor of water and other ingredients in small quantities. The composition of the gaseous mixture just above mentioned, represents the atmosphere in a normal condi- V 1 and Fig. 4, is a cross section on tion, but when the air is closed up, with its occupants in a room without exterior communication, the air will contain many in gredients detrimental to the health when breathed into the lungs. The air in such cases is rendered unfit for respiration very largely, by the exhaustion of the oxygen and the production of carbonic acid gas.

The means by which my invention is carried into eiiect are shown in the accompanying drawing, in which Figure 1, is an elevation, in perspective, of the device. Fig. 2 is a side elevation of a section on the line A-B, of Fig. 1. Fig. 3 is a cross section on the line C- of Fig. the line EF, of Fig. 1.

The various parts of the device are referred to by letters, similar letters denoting corresponding parts in the several views.

Referring to the drawing, the letter h designates a metallic box or case. Thiscase is provided with three openings having suitable covers. The lower one of said openings (Z, admits the outer air. The upper opening 6, is in the top or cover of the case, to permit the introduction of alcohol or other suitable combustible, which saturates the filament i and the pumice'stone 7c. The third opening m, connects the heating devices with the outer air.

A lamp n, is located in the projecting part of the upper end of the case h, and is fixed to the case by a threaded ring 0, and when not in use, is covered with a cap 10. This lamp n, is provided with a tubular gauze '1", of very fine platinum wire held in place by a thin frame of nickel attached to the tube.

Specification of Letters Patent.

Application filed February 13, 1913.

Patented June 23, 1914-. Serial No. 748,147.

The tube r contains two or three globules of sponge of platinum, to initiate the ignition of the combustible vapor.

The case 7L, is divided into three parts, of which the lower one constitutes a small cavity to control the inflow or" the air. The

middle part it is the largest part, and 'is provided exteriorly with vertical ribs 6 with grooves between them, up which, on the inside there extends a thick cloth or wick filament z, thecentral space being studied with raw cotton i. The upper divi sion of the casing is occupied by pieces of pumice stone contained in a tube of metallic cloth.

V is the oximeter which I employ, having a face scale o.

In order to graduate the oximeter it is necessary to mark a point in the scale corresponding to the highest tem perature obtained by the calorific focus which is fed by pure country air and is to be considered as normal air. The other divisions of the scale are marked by placing the apparatus in a glass through which circulates slowly and in an upward direction a gaseous ,mixture, or artificial air, formed of pure oxygen and nitrogen, whose respective quantities in volume are measured beforehand, at will, and subject to the conditions of the normal air. In this manner is graduated an apparatus of great precision for the graduation of all the others which are being constructed for comparison with the first one using the arbitrary gaseous mixtures formed by the air united to the products of the respiration.

Having now described the invention, what I claim, isi 1. An apparatus for ascertaining the proportion of oxygen present in a gaseous mixture, comprising a metal casing provided with vertical ribs, an overhanging top por tion on said casing, a valve in the lower portion adapted to admit the gaseous mixture to be tested, an absorbent filling in the main portion of said casing, the top portion of said casing being provided with an aperture for the introduction of a combustible liquid, a wire gauze sleeve connecting two openings through which one leg of a differential thermometer passes, a threaded collar to secure said sleeve, a heating device surrounding the bulb on said leg of said thermometer, said heating device being open at both ends and provided with a wire gauze member and with -means chemically adapted to cause combination of oxygen with the combustible gas or vapor, the other leg of said thermometer being exposed to the action of the atmosphere.

2. Apparatus for ascertaining the proportion of oxygen present in a gaseous mixture comprising a metal casing provided with vertical ribs, an overhanging top portion on said casing, a valve in the lower portion adapted to admit the gaseous mixture to be tested, an absorbent filling in the main portion of said casing, the top portion of said casing being provided with an aperture for the introduction of a combustible liquid, a wire gauze sleeve connecting two openings through which one leg of a differential thermometer passes,a threaded collar securing said sleeve, a heating device surrounding the bulb on said leg of said thermometer,

the heating device being open at both ends 20 and providedwith a wire gauze and with means chemically adapted to cause the combination of oxygen with the combustible '1 duced, or the percentage of oxygen in the gaseous mixture.

In witness whereof I have hereunto set my hand in, the presence of two witnesses.

J UAN GALAFAT Y LEON.

Witnesses:

J ULIO Onrrs DE BUReos, B. LITNA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, I). G. 

